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Chronic pain, pain that lasts for more than six months or so, is a huge problem. It affects at least ten per cent of the world鈥檚 population; about 60 million people. The treatment options range from drugs to cognitive behavioural therapy, but are fairly limited, and scientists are trying to find out more about the chemical conversations going on in our brains which control how we feel pain.
They have known for a while that we have receptors in our brain, like tiny docking stations, that link up with natural painkilling opiates like endorphins to reduce pain. But now for the first time, researchers have shown that the numbers of these opiate receptors seem to increase in response to pain, naturally increasing our pain thresholds and helping people with chronic pain cope better. Anthony Jones is professor of neuro-rheumatology at the University of Manchester, and his research has just been published in the journal Pain.

Maternal health Sierra Leone
Sierra Leone has amongst the worst rates of maternal mortality in the world. In the last five years, the government has been tackling the problem head on by providing better care for pregnant and breastfeeding women. Maternal healthcare was improving, but then the Ebola crisis struck. A report from the World Bank estimates that more than 4,000 extra women a year across Guinea, Liberia and Sierra Leone could die from complications during pregnancy and child birth, because of the devastating effect of Ebola on already fragile health systems. The 大象传媒鈥檚 Kati Whitaker reports from Sierra Leone.

Film & health
Film is powerful and is something that a group of health advocates, doctors, patients and film-makers want to tap into more to spread public health messages. They believe that film is the ideal medium to communicate stories, to inspire and encourage people about their health; even address health inequalities round the world. They have organised the first Global Health Film Festival, which takes place this week (October 30th and 31st 2015) at the Royal Society of Medicine in London. Dr Joseph Fitchett is a clinical research fellow at Harvard School of Public Health and a co-founder of the Global Health Film Initiative, the partnership behind the festival.

Picture: Patients with chronic pain have differences in opioid receptors in a region of the brain that processes pain and motivation.
Credit: Human Pain Research Group, University of Manchester